- (informal) An extended period of play.
- 1984, Joanne Oppenheim, Kids and play Before long, the other youngster came up the aisle with crayons and paper in hand. "Wanna color?" she asked. In moments, the two were launched on a four-hour playathon.
- 1993, "Alison Hsieh", Now?????!!!!! (on newsgroup k12.chat.senior) Our orchestra is going to have a playathon in the mall where we will play music for about 5 hours or so.